Anker Soundcore Liberty 4 NC left earbud makes a buzzing noise with ANC on, how can I fix this issue?

If your Anker Soundcore Liberty 4 NC left earbud emits a buzzing noise with ANC turned on, take these steps to resolve the problem:

First, clean the earbuds, especially the microphone and speaker grilles, since debris or dust can interfere with the noise-cancelling capability.

Use a gentle, dry cloth or a small brush to gently clean these locations, making that no blockages interfere with ANC effectiveness.

Next, reset the earbuds to remove any software issues. Place them in the charging case, keep the lid open, and push the reset button for 10 seconds, or until the indicator light flashed.

After resetting, reconnect the earbuds to your device and test them with ANC turned on to see if the buzzing continues.

If the problem persists, check for firmware upgrades using the Soundcore app. Connect the earphones to the app, then go to the firmware update section and install any available upgrades that may fix the issue.

If none of these methods work, consider filing a complaint on Xolvie to raise awareness about the issue and inform others.